Back-stop for forging-machines.



J. R. BLAKESLEE, JR. BACK STOP FOR FORGING MACHINES.

APPLICATION FILED MAR. 18, 1907.

Patented Dec. 14, 1909.

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41; aliorlzay J. R. BLAKESLEE, JE- BAGK STOP FOR FORGING MAGHINES, APPLICATION-FILED MAR. 18, 1907;

Patented Dec. 14, 1909.

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J. R. BLAKESLEE, JR. BACK STOP r03 rename momma.

APPLICATIUN FILED MAR. 18, 1907. 943,377. Patented Dec. 14, 1909.

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I 4 I t 13 UNITED STATES PATENT OFFICE.

QTOHN R. BLAKESLEE, JR., OF CLEVELAND, OHIO, ASSIGNOR TO THE AJAX MANUFAC- TURING COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

BACK-STOP FOR FORGING-MACHINES.

Specification of Letters Patent.

Patented Dec. 14, 1909.

To all whom it may concern:

Be it known that I, JOHN R. BLAKESLEE, J12, a citizen of the United States, resident of Cleveland, county of Ouyahoga, and State of Ohio, have invented a new and useful Improvement in Back-Stops for Forging- Machines, of which the following is a specification, the principle of the invention being herein explained and the best mode in which I have contemplated applying that principle, so as to distinguish it from other inventions.

My invention relates to forging machines and the like, and has particular regard to the provision of an improved back-stop for use in conjunction with machines of this class. As will be readily understood, it not infrequently becomes necessary in the forging of certain kinds of work, to provide means for receiving and supporting the outer end of the piece being operated upon. This would be the case, for instance, in the forging of axles. As such supporting means are subjected to more or less thrust incidentally to the stroke of the forming tool it is necessary to render the same quite rigid and substantial in construction. Heretofore this has been accomplished by connecting the stop member directly to the frame of the machine, usually by lateral frame members secured to the sides of the machine frame and to those of the block serving as a stop, the latter being supported on the floor as most convenient. Two difi'iculties are attendant upon this scheme of back-stop construction; first, adjustment of the stop in order to accommodate thereon stock of different lengths is not easy to arrange; and, second, by reason of the lateral frame members the stop is made in effect a continuation of the forging machine and this not only takes up considerable unnecessary room, whether in use or not, but also renders the stock opening and dies of the machine in convenient of access. It has been with the view of obviating these and related difficulties that my present invention has been devised. Said invention, then, consists of the means hereinafter fully described and particularly pointed out in the claims.

The annexed drawings and the following description set forth in detail certain meclr anism embodying the invention, such disclosed means constituting but one of various mechanical forms in which the principle of the invention may be used.

In said annexed drawings: Figure 1, is a plan view of a forging machine with my improved back-stop construction connected therewith; Fig. 2 is a side elevation of the same; Fig. 3 is a vertical transverse crosssection of the same shown on a larger scale and as taken 011 the line 3-3, Figs. 1 and 2; while Figs. f and 5 are respectively a plan view and a side elevation of a modified form of rest designed for use with such stop under certain conditions of service.

In those figures of the foregoing list in which the forging machine appears, it should be stated that such machine is shown in a partially dismantled condition for the reason that it is the relation of the backstop thereto that is alone of present interest. Of such machine as shown then A designates the bed frame that is solidly mounted upon a suitable foundation A of concrete or the like. This bed frame A is formed with the usual longitudinal slide-way a for the reception ofthe block or crosshead, (not shown), that bears the forming tool, such block being reciprocated by a suitable connecting rod joining the same with crankshaft (4. The latter is driven, through intermediate gears a a from drive shaft a upon which is mounted the combined flywheel and driving pulley a Opposite the end of slide-way a is formed the usual workopening or slot a through which the stock to be operated upon by the dies and forming tool of the machine is designed to be introduced. It is contiguous to this end of the machine, of course, that the back-stop, which forms the subject matter of the present application, is located. As a base for such stop a heavy bed-plate B is provided, such bedplate being embedded in the same concrete foundation A upon which rests machine frame A. The forward end of the plate is for the sake of additional security and rigidity preferably attached to the base of such machine frame as by bolts Z). The upper face of bed-plate B, which from the disposition of the plate as aforesaid will be seen to lie substantially on a level with the base of the forging machine, forms a slideway upon which the back-stop proper is designed to rest. Longitudinally disposed in such slide-way are provided two parallel under-cut grooves bof inverted T crosssection, and intermediate of these grooves a series of holes or like recesses [1 The back-stop proper consists primarily of a stand or post 0 resting as stated upon the slide-way formed by bed-plate B and having its front face 0 substantially perpendicular, its rear face supported by two spaced sloping abutments 0. Such stand or post is secured to the slide-way by bolts 0 the heads of which are held in undercutgrooves b. To further secure or retain the stand in place, since the frictional contact between the base thereof and the slide-way would hardly suflice even with bolts 0 drawn tight, a pin or plug 0 that may be removably inserted in holes 5 is employed. As the position of the stand is from time to time changed pin 0 is shifted from one hole 7% to another and by the insertion of a suitable block or wedge a is employed to back up solidly the stand against any thrust on the latters forward face. On this face, and near the base of the stand, is formed an integral outwardly projecting arm a; that portion of such face lying above arm is formed with a laterally projecting slideway provided with longitudinally disposed undercut grooves a similar to those in the bed-plate B. Such face 0, and hence the slide-way under consideration, is furthermore intersected for a portion of its length by a longitudinally disposed slot 0 Vertically adjustable along this slide-way is a bracket C that is secured thereto by being so formed as to embrace the laterally projecting portions thereof, and by means of bolts 0 the heads of which are held in grooves c. Adjustment of this bracket as to height is had by means of a rod 0 having its lower end thrzaded in arm and its upper end disposed to support the bracket 011 its under side. A portion of rod 0" is suitably squared to receive a wrench; obviously by proper and sufficient rotation of the rod, the elevation of the bracket may be altered as desired. Slot 0 is utilized to receive a short, heavy bolt a having a circular head disposed to lie above bracket 0 on slide-way c. The nut c of bolt 0" is designed to be inserted between the ribs or flanges, which the upper portions of abutments c terminate, and there be held against rotation. To loosen the bolt in the slot the head hence requires to be turned; to this end several radial apertures 0 are drilled in its periphery to receive a pin or rod and thereby facilitate turning of the head. Such bolt is adjusted, in the manner just described, so as to lie with the head disposed adjacent to the end of a rest 0 ,borne by bracket C and intended to receive and sustain the outer end of the stock. This rest exactly the proper position to receive the stroke of the forming tool is easily made by the means and in the manner, previously explained. Endwise adjustment of the backstop is of course effected by movement of the stand O, as a whole, along slide-Way B. Vhere final and more or less minute adjustment in this respect is required above that readily obtainable through plug 0 and blocks 0*, such adjustment may be had by inserting one or more washers 0 between the head of bolt 0 and the face of the slide-way c.

These washers are preferably of U-shape in order to permit of their insertion and removal without disengaging the bolt from the slot.

Where, as in certain classes of work, the stock is much shorter than that for which the parts of the back-stop are shown as being arranged in Figs. 1 and 2, stand C may require to be moved up almost against the rear end of the forging machine. In this event it may be of advantage to employ the modified form of rest illustrated in Figs. 4 and 5. Such modified rest, like the regular rest, consists of a block 0 and differs therefrom mainly in being longer and having its forward end 0 shaped to fit snugly within work-opening a of the machine frame. The upper face of the block is provided with a groove or notch 0 as before.

The advantages arising from the improved construction of back-stop exemplified in the particular form thereof herein described should be sufficiently obvious not to require detailed explanation. Attention may, however, be called to the fact that the two difliculties, to which attention had earlier been directed, are here entirely overcome. Not only is no additional impediment interposed to a close approach by the workmen to the machine when in operation, but when not in use, as will frequently be the case in connection with machines employed for general forging, the back-stop is out of the Way or if desired may be removed entirely by simply loosening a few bolts. At the same time ready adjustment of such stop is to be had both longitudinally and vertically to exactly position the stock for operation.

Other modes of applying the principle of my invention may be employed instead of the one explained, change being made as regards the mechanism herein disclosed provided the means stated by any one of the following claims or the equivalent of such stated means be employed.

I therefore particularly point out and distinctly claim as my invention:

1. The combination with a forging machine or the like; of a slide-way terminally contiguous to the base of said machine, said slide-way lying substantially on a level with the floor on which said machine rests, and being supported by means disposed below said level; and a back-stop adjustably secured in said slide-way and projecting upwardly to the working level of said machine, the upper end of said back-stop being adapted to support the outer end of the stock being operated upon by said machine.

2. The combination with a forging machine or the like; of a back stop, comprising a stand having a substantially vertical front formed with a projecting arm, a slide-way thereabove and a longitudinally disposed slot intersecting such slide-way, a bracket mounted in said slide-way, means interposed between said arm and bracket for adjustably positioning the latter, a rest borne by said bracket, and a bolt secured in said slot and adapted to be secured with its head adjacent to said rest, said rest being adapted to support the outer end of the stock being operated upon and said head serving to retain said stock against end-wise move ment.

3. A back-stop for forging machines or the like comprising a stand having a substantially vertical front formed with a projecting arm, a slide-way thereabove, and a longitudinally disposed slot intersecting said slide-way, a bracket mounted in said slideway, a screw mounted in said arm and engaging said bracket to adjustably posi tion the same, a rest borne by said bracket, and a bolt secured in said slot and adapted to be secured with its head adjacent to said rest, said rest being adapted to support the outer end of the stock being operated upon and said head serving to retain such stock against end-wise movement.

4. A back-stop for forging machines or the like comprising a stand having a substantially vertical front formed with a projecting arm, a slide-way thereabove, and a longitudinally disposed slot of T cross-section intersecting said slide-way, .a bracket mounted in said slide-way, a screw mounted in said arm and engaging said bracket to adjustably position the same, a rest borne by said bracket, and a bolt having its nut secured in said slot and its head disposed adj acent to said rest, said rest being adapted to support the outer end of the stock being operated upon and said head serving to retain such stock against end-wise movement.

5. The combination of a back-stop for forging machines or the like with a bedplate, said bed-plate being formed with two parallel longitudinally disposed slots of T cross-section and with a series of holes lying intermediately of said slots, and said backstop being mounted upon said bed-plate and projecting upwardly to the working level of the forging or like machine; bolts, with their heads secured in such T slots for securing said back-stop to said bed-plate, a pin in the rear of said back-stop adapted to engage said holes, respectively, to retain said stop in place, and means borne by said stop for supporting the outer end of the stock being operated upon by said machine, said supporting means being vertically adjustable and also longitudinally adjustable within a distance equal to the distance between adjacent holes in said bed-plate.

Signed by me, this 12th day of lvlarch, 1907.

JOHN R. l-HJAKESLEE, Ju.

Attested by- D. T. DAVIES, JNO. F. OBERLIN. 

